Instructions:1) Open package and remove bridge and glowsticks,2) Bend and snap them along entire length, shake to start glowing,3) Insert ends of glow sticks into bridge and attach arms to form barrette4) Size: 1.5" 4.5 x 40mm

We can pack it according to your requirement.

Generally our standard glow sticks can bright for 6-8 hours,and more than 12 hours for bif size. The duration of chemiluminescence is up to the temperature, (i.e the higher temerature, the shorter duration).Based on this characterstic,you can store the glow sticks in the low temperature places before use, such as icebox ,freezer...

Glow Stick is made uo of plastic tube and glass tube with two different liquids,when use it ,curve the glow stick gently,snap the glass tube off ,shake gently to mix two liquids,in order to achieve the best glow effect.